The human nervous system is broken up into central and peripheral parts. the central system (cns) is made up of

sensory and motor neurons
the brain and motor neurons
the brain and spinal cord

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Speed is the ratio of the distance of an object moves to

In what part of the body does the most muscle activity happen?